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Tweaked shadowmap bias to fight shadow acne

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This commit is contained in:
Robert Beckebans 2015-03-19 01:27:44 +01:00
parent 319b659302
commit 395ef525b1
5 changed files with 13 additions and 5 deletions
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6
base/renderprogs/interactionSM.pixel
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@ -196,7 +196,9 @@ void main( PS_IN fragment, out PS_OUT result )
float bias = 0.001;
shadowTexcoord.xyz /= shadowTexcoord.w;
shadowTexcoord.z = shadowTexcoord.z * 0.9995;
shadowTexcoord.z = shadowTexcoord.z * rpScreenCorrectionFactor.w;
//shadowTexcoord.z = shadowTexcoord.z * 0.999991;
//shadowTexcoord.z = shadowTexcoord.z - bias;
shadowTexcoord.w = float(shadowIndex);
@ -216,7 +218,7 @@ void main( PS_IN fragment, out PS_OUT result )
float shadow = 0.0;
//float stepSize = 1.0 / 16.0;
float numSamples = rpScreenCorrectionFactor.w;
float numSamples = 16;
float stepSize = 1.0 / numSamples;
float4 jitterTC = ( fragment.position * rpScreenCorrectionFactor ) + rpJitterTexOffset;

6
neo/renderer/RenderProgs_embedded.h
View file

@ -4389,7 +4389,9 @@ static const cgShaderDef_t cg_renderprogs[] =
" float bias = 0.001;\n"
" \n"
" shadowTexcoord.xyz /= shadowTexcoord.w;\n"
" shadowTexcoord.z = shadowTexcoord.z * 0.9995;\n"
" \n"
" shadowTexcoord.z = shadowTexcoord.z * rpScreenCorrectionFactor.w;\n"
" //shadowTexcoord.z = shadowTexcoord.z * 0.999991;\n"
" //shadowTexcoord.z = shadowTexcoord.z - bias;\n"
" shadowTexcoord.w = float(shadowIndex);\n"
"\n"
@ -4409,7 +4411,7 @@ static const cgShaderDef_t cg_renderprogs[] =
" float shadow = 0.0;\n"
" \n"
" //float stepSize = 1.0 / 16.0;\n"
" float numSamples = rpScreenCorrectionFactor.w;\n"
" float numSamples = 16;\n"
" float stepSize = 1.0 / numSamples;\n"
" \n"
" float4 jitterTC = ( fragment.position * rpScreenCorrectionFactor ) + rpJitterTexOffset;\n"

2
neo/renderer/RenderSystem_init.cpp
View file

@ -235,6 +235,8 @@ idCVar r_shadowMapLodBias( "r_shadowMapLodBias", "0", CVAR_RENDERER | CVAR_INTEG
idCVar r_shadowMapPolygonFactor( "r_shadowMapPolygonFactor", "2", CVAR_RENDERER | CVAR_FLOAT, "polygonOffset factor for drawing shadow buffer" );
idCVar r_shadowMapPolygonOffset( "r_shadowMapPolygonOffset", "3000", CVAR_RENDERER | CVAR_FLOAT, "polygonOffset units for drawing shadow buffer" );
idCVar r_shadowMapOccluderFacing( "r_shadowMapOccluderFacing", "2", CVAR_RENDERER | CVAR_INTEGER, "0 = front faces, 1 = back faces, 2 = twosided" );
idCVar r_shadowMapRegularDepthBiasScale( "r_shadowMapRegularDepthBiasScale", "0.999", CVAR_RENDERER | CVAR_FLOAT, "shadowmap bias to fight shadow acne for point and spot lights" );
idCVar r_shadowMapSunDepthBiasScale( "r_shadowMapSunDepthBiasScale", "0.999991", CVAR_RENDERER | CVAR_FLOAT, "shadowmap bias to fight shadow acne for cascaded shadow mapping with parallel lights" );
// RB end
const char* fileExten[3] = { "tga", "png", "jpg" };

2
neo/renderer/tr_backend_draw.cpp
View file

@ -1302,7 +1302,7 @@ static void RB_RenderInteractions( const drawSurf_t* surfList, const viewLight_t
screenCorrectionParm[0] = 1.0f / ( JITTER_SIZE * shadowMapSamples ) ;
screenCorrectionParm[1] = 1.0f / JITTER_SIZE;
screenCorrectionParm[2] = 1.0f / shadowMapResolutions[vLight->shadowLOD];
screenCorrectionParm[3] = shadowMapSamples;
screenCorrectionParm[3] = vLight->parallel ? r_shadowMapSunDepthBiasScale.GetFloat() : r_shadowMapRegularDepthBiasScale.GetFloat();
SetFragmentParm( RENDERPARM_SCREENCORRECTIONFACTOR, screenCorrectionParm ); // rpScreenCorrectionFactor
float jitterTexScale[4];

2
neo/renderer/tr_local.h
View file

@ -1070,6 +1070,8 @@ extern idCVar r_shadowMapLodBias;
extern idCVar r_shadowMapPolygonFactor;
extern idCVar r_shadowMapPolygonOffset;
extern idCVar r_shadowMapOccluderFacing;
extern idCVar r_shadowMapRegularDepthBiasScale;
extern idCVar r_shadowMapSunDepthBiasScale;
// RB end
/*